I want to ensure that my answers are right from a to d?

What is the present value of:(Use a Financial calculator to arrive at the answers. Round the final answers to nearest whole dollar.)

a.$8,200 in 15 years at 9 percent?

Present value$2,251

b.$36,000 in 9 years at 14 percent?

Present value$11,070

c.$45,000 in 13 years at 10 percent?

Present value$13,035

d.$1,000 in 20 years at 16 percent?

Present value$51